(19)
(11) EP 0 809 006 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
26.07.2000 Bulletin 2000/30

(43) Date of publication A2:
26.11.1997 Bulletin 1997/48

(21) Application number: 97108413.2

(22) Date of filing: 23.05.1997
(51) International Patent Classification (IPC)7: F02D 33/02
(84) Designated Contracting States:
DE FR GB

(30) Priority: 24.05.1996 JP 130096

(71) Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
Aichi-ken (JP)

(72) Inventor:
  • Tsuzuki, Naoyuki
    Toyota-shi, Aichi-ken 471 (JP)

(74) Representative: Pellmann, Hans-Bernd, Dipl.-Ing. et al
Patentanwaltsbüro Tiedtke-Bühling-Kinne & Partner Bavariaring 4-6
80336 München
80336 München (DE)

   


(54) Apparatus for controlling engine intake air


(57) An apparatus for controlling intake air in a diesel engine (11) is disclosed. The engine (11) has an air-intake passage (16) and an intake restriction valve (25) in the air-intake passage (16). The restriction valve (25) is coupled to an accelerator pedal (60) and an actuator (26). The restriction valve (25) varies its opening in accordance with the operation of the accelerator pedal (60) and the driving state of the engine (11) to adjust amount of intake air flowing in the air-intake passage (16) to the engine (11). The apparatus is characterized by the actuator (26), an electric vacuum regulating valve (EVRV 34), and an electronic control unit (ECU 39) for compensating a deviation of the opening of the restriction valve (25) based on differential pressure downstreams and upstreams of the valve (25) in the air intake passage (16). The deviation is based on pressure of the intake air applied to the restriction valve (25).






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